Concrete pole



Sept. 8, 1925.

A. HENDERSON concnriws POLE Filed Aug. 25 1922 Patented Sept. 8, 1925.

UNITED STATES 1,553,158 PATENT ALBERT HENDERSON, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOB TO HFiNDEESOIxT CORPORATION, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

' I CONCRETE POLE.

Application filed August 23, 1922. Serial No. 583,806.

To all whom it may concern:

Be it known that I, ALBERT HENDERSON, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Concrete Poles, of which the following is a specification.

This invention relates to reinforced con crete construction and has special reference to the production of poles and piles, the invention relating particularly tothe manner of combining pre-cast reinforced concrete blocks to produce a pole, such as a telegraph or trolley pole or a pile, and connecting the blocks so as to produce a strong permanent structure. The invention is illustrated in the accompanying drawings and will be hereinafter fully set forth.

In the drawings .7

Figure 1 is an elevation embodying my invention;

Figure 2 is a detail perspective View of one of the blocks employed in the pole shown in Figure 1;

Figure 3 is an end View of the same block of a trolley pole illustrating one means for reinforcing the block and tying it in the completed structure; I

Figure 4 is a detail elevation showing another form of pole embodying the invention' Ilf producing a pole in accordance with my present invention, a suitable foundation hole is dug at the site selected for the pole, and blocks 1 are superposed one upon another from the bottom of the hole to a point corresponding to the top of the pole. The lowermost block may rest upon an anchor 2 which may be of concrete or may be of metal suitably coated to prevent corrosion. The blocks are constructed with a plurality of openings 3 therethrough to permit the insertion of reinforcing and tying rods, indicated at 4, through the entire series of blocks and it will be understood, of course, that, when the blocks are molded or manufactured at the central plant, suitable reinforcements will be embedded therein, which reinforcements may-beofany convenient or preferred form. In opposite endsor faces of the blocks, grooves 5 are formed to accommodate tying reinforcing members, such as shown at 6, whereby to facilitate the connecting of cross arms and braces to the main body of the pole. The reinforcing rods, indicated at a, may be metallic bars equal in length to the height of the pole and anchored in any convenient or preferred mannor to the foot or base 2 and at the top of the pole. These bars will be placed under tension in any convenient or preferred manner so as to securely clamp all the blocks togetherand, if desired, the joints between the blocks may be pointed up with grout or other plastic filling so that, when said filling or binding has set, a monolithic struc-- ture will be had. In Figure 1, I have shown the pole provided with a lateral arm 7 and a strut or brace 8 extending between-the bottom of said arm and the side of the pole. This arm and the brace are likewise constructed of reinforced concrete blocks held together by a tying reinforcement 9, the ends of which are carried into the joints between adjacent blocks of the pole and the armrespectively, as indicated at 10 and as shown more in detail at 6 in Figur 3. After the blocks are in place, grout is poured through the openings 3 so as to bind the entire mass together and embed the tying reinforcing rods, and to accomplish this same result in the arm and the brace and also to accommodate the tying reinforcement 6' or 10, the blocks may be chipped or cut, as indicated at 11, to accommodate said reinforcements and permit the introduction of the plastic binder into the joints, it being understood that this binder or filler will flow through all the grooves 5 and, when set, will constitute a key holding the blocks together in a monolithic structure.

To facilitate the work of linemen, steps 12 are provided and these steps may be merely rods having their ends upturned,

the length of the rods being greater than the width of the poleso that, if the rods be fitted in the central groove 5 between adja cent blocks, the ends thereof will project he ,yond the sides of the pole and constitute upper end of the pole, the wire being enin a hook or eye 21 tied into the joint between two adjacent blocks, as will be readily understood.

1 claim:

1. A. pole formed of superposed blocks tied together by reinforcing rods extending therethrough, id an arm co ected to the pole and i ed and to end and tie together by reinforcing rods er-ztcndin h and connected to certain of said 1 .ientioned rods, sul'istantially as describr i1.

2. A pole Y 0: led together by reinforc i is through, and an arm extending from the pole and formed of blocks arranged end to end and tied together by reinforcing rods extending therethrongh, said last-mentioned reinforcing rods eatending into the pole and being connected to certain of said first-mentioned rods, substantially as def stperposed blocks in rods extending scribed.

O. A pole formed of sup-rposed e-cast cementitious blocks tied together by reinforcing rods extending therethrouqh, and an arm extending from the pole and formed of pro-cast cementitious blocks tied together by reinforcing rods extending therethrough, said last-mentioned reinforcing rods extending between meeting end faces of certain of the blocks of the pole and being connected to certain of said first-mentioned rods, substantially as described.

i. A pole formed of superposed pro-cast cementitious blocks having grooves in their end faces filled with grout, metal rods em bedded in said pole and tying the blocks thereof together, an arm extending from the pole and formed of pie-cast cementitious blocks arranged end to end, and metal rods embedded in the arm and extending into the grooves between meeting end faces of certain of the blocks of the pole and tying the arm thereto, substantially as described.

5. A pole formed of superposed pro-cast ceinentitious bloclis having grooves in their end faces filled with grout, metal rods embedded in said pole and tying the blocks thereof together, an arm extending from the pole and formed of precast ceinentitious blocks arranged end to end, and metal rods embedded in the arm and having a looped portion positioned in the grooves between meeting end faces of certain of the blocks of the pole and tying the arm thereto, substantially as described.

6. A. pole formed of superposed pre-cast ceinentitious blocks tied together by reinforcing rods extending therethrough, an arm connected to the pole and formed of precast cementitious blocks arranged end to end and tied together by reinforcing rods extending therethrough and connected to certain of said first-mentioned rods, and a strut connected at its ends to said pole and arm and formed of pre-cast cementitious blocks arranged end to end and tied together by reinforcing rods extending therethrough and connected to certain of the rods of the pole and the arm, substantially as described.

7. A pole formed of superposed pre-cast ceinentitious blocks tied together by reinforcing means extending therethrough, an arm extending from said pole formed of pike-cast cementitions bi cks arr ed end to end and tied together by reiifo means extending therethrough and be w meeting end faces of certain of the bloods of the pole to tie the arm thereto and a strut extending diagonally between s sole and arm and formed of pre-ca-st ce .ontt tious blocks arranged end to end tied together by reinforcing means extending therethrough and between meeting end faces of certain of the blocks of the pole i l of certain of the blocks of the arm to tie the strut to the pole and arm, substantially as described. a

8. A pole formed of superpose-C prectst cementitious blocks, a portion of the no e oeing formed of blocks of the same (in ions and each in the form of a right parallelepipedon and another portion of the pole being formed of similar blocks of the same size but having a different cross sectional area than the blocks of the first portion of the pole, and continuous reinforcing rods extending through all of said blocks and tying them together, substantially as described.

9. A pole formed of superposed pie-cast cementitious blocks, a portion of the pole being formed of blocks of the same dimensions and each in the form of a right parallelepipedon and another portion of the pole being formed of similar blocks of the same size but having a different cross sectional area than the blocks of the first portion of the pole, a reducer block interposed between said portions of the pole and having its end faces of the same cross sectional areas as the blocks in contact therewith, and continuous reinforcing rods extending through all of said blocks, including said reducer block, and tying them together, substantially as described.

10. A pole formed of superposed blocks having registering grooves in their meeting end faces filled with grout, said blocks being tie together by reinforcing rods extending therethrough, and an arm extending from the pole and formed of blocks arranged end to end and tied together by reinrorcing rods extending therethrough and connected to certain of said first-mentioned rods, substantially as described.

In testimony whereof I affix my signature.

ALBERT HENDERSON. [Ls] ill) 

